JP7267195B2 - catheter kit - Google Patents

Description

The present invention relates to a catheter kit containing a catheter containing an optical fiber.

Catheters containing optical fibers are used for patient diagnosis and treatment. For example, US Pat. No. 6,200,008 discloses thrombolytic therapy. When using a catheter for thrombolytic therapy, the catheter is first inserted into the patient's body. After that, the affected area is irradiated with laser light through the catheter.

Japanese Patent No. 4409499 Japanese Utility Model Publication No. 6-42182 JP-A-8-262278

The catheter is inserted into the body during use. Therefore, it must be sufficiently sterilized when it is inserted into the body. Therefore, during storage and transport, the catheter is housed in a tubular container called a hoop to keep it clean. Therefore, in order to keep the catheter clean, it is desirable to keep the catheter in the hoop until just before use.

In the method disclosed in Patent Document 1, it is desirable to irradiate the affected area with a laser beam having a predetermined intensity. Therefore, as disclosed in Patent Documents 2 and 3, the light intensity is confirmed immediately before starting treatment.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a catheter kit that maintains the cleanliness of the catheter and facilitates the work of checking the light intensity.

A catheter kit according to one aspect of the present invention includes a catheter having an optical fiber and a catheter container for containing the catheter. The catheter container includes a tubular hoop and a position adjustment part provided on the hoop. , the hoop has a hoop tip where a catheter tip from which light transmitted through the optical fiber is emitted is arranged, and a hoop proximal end on the side opposite to the hoop tip, and a position adjustment part changes the position of the catheter tip relative to the hoop tip.

According to this catheter kit, the light intensity can be measured while the catheter is housed in the hoop. Therefore, it is possible to maintain the cleanliness of the catheter and to easily check the light intensity. Furthermore, according to this catheter kit, it is possible to change the position of the tip of the catheter during storage and the position of the tip of the catheter during measurement. That is, during storage, it is possible to arrange the distal end of the catheter on the far side with respect to the distal end of the hoop. As a result, the tip of the catheter can be protected. Furthermore, it is possible to align the tip of the catheter with the tip of the hoop during measurement. As a result, it is possible to suppress the occurrence of variations in the distance from the distal end of the catheter to the light receiving section.

The catheter housing may further have a closure provided at the end of the hoop, and the closure may have a transmission window through which light emitted from the catheter is transmitted. With this configuration, it is possible to reliably protect the distal end of the catheter and to measure the light intensity.

The end of the hoop has an opening, the end of the hoop is provided with a catheter tip from which light transmitted through the optical fiber is emitted, and the transmission window closes the opening and transmits light. good. With this configuration as well, the tip of the catheter can be reliably protected, and the light intensity can be measured.

The closure may be a cap member that is removable from the hoop. According to this configuration, the configuration of the hoop end can be selected according to the mode of measuring the light intensity. That is, it is possible to select a mode in which the measurement is performed while protecting the end from which the light is emitted, or a mode in which the measurement is performed while the light is directly incident on the measuring device.

The closure may be a lid that is part of the hoop and is integral with the hoop. With this configuration, the lid does not come off the hoop. As a result, the tip of the catheter is reliably protected.

The hoop may have a through hole extending in a direction intersecting the longitudinal direction of the hoop and extending from the outer peripheral surface to the inner peripheral surface. According to this configuration, sterilization gas can be preferably provided to the catheter housed in the hoop.

ADVANTAGE OF THE INVENTION According to this invention, the catheter kit which can maintain the cleanliness|cleanliness of a catheter and can perform the confirmation operation|work of light intensity easily is provided.

FIG. 1 is a diagram showing the configuration of a light measurement device according to an embodiment. FIG. 2 is a cross-sectional view showing an enlarged configuration of the adapter and catheter kit shown in FIG. FIG. 3 is a cross-sectional view for explaining the operation of the position adjusting mechanism. FIG. 4 is a flow diagram showing main steps of the optical measurement method according to the embodiment. FIG. 5 is a diagram for explaining the main steps shown in FIG. FIG. 6 is a diagram for explaining main steps following the steps shown in FIG. FIG. 7 is a diagram for explaining main steps following the steps shown in FIG. FIG. 8 is a perspective view showing a cross section of a catheter kit according to modified examples 1, 2, and 3. FIG. FIG. 9 is a perspective view showing a cross section of a catheter kit according to modifications 4, 5, and 6. FIG. 10 is a side view showing a cross section of a catheter kit according to Modification 7. FIG. 11 is a plan view showing a catheter kit according to modification 8. FIG. FIG. 12 is a side view showing a cross section of a catheter kit according to modifications 9, 10, and 11. FIG. 13 is a perspective view showing a cross section of a catheter kit according to modified examples 12 and 13. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

As shown in FIG. 1, the light measuring device 1 measures the intensity of laser light L. As shown in FIG. Laser light L is provided from light source 101 to catheter kit 30 . A laser beam L is emitted from the catheter kit 30 . The optical measurement device 1 has a power meter 2 and an adapter 3 (second adapter). In the following description, the side of each component from which light is emitted will be referred to as the "tip". The opposite side of the "tip" is defined as the "base end". For example, in the catheter kit 30, the end that emits the laser light L is the "tip". The end that receives the laser light L is the "base end".

The power meter 2 has a housing 4 , a light receiving section 6 , a mounting section 7 and a processing device 8 .

The housing 4 maintains the relative positional relationship between the light receiving section 6 and the mounting section 7 . The housing 4 is made of an opaque material. The housing 4 constitutes a closed space together with the adapter 3 . The light receiving unit 6 is arranged inside the closed space. This configuration can prevent stray light from entering the light receiving section 6 .

The light receiving unit 6 receives laser light L output from the catheter kit 30 . The light receiving section 6 includes, for example, a light absorber. The light receiving section 6 converts the absorbed light into heat. After that, the light-receiving unit 6 outputs the heat change as an electric signal change. Examples of light absorbers include 3A-P manufactured by Ophir. An electrical signal output by the light receiving unit 6 is transmitted to the processing device 8 via a signal cable. The processing device 8 obtains the intensity of the light received by the light receiving section 6 based on the electrical signal. The processing device 8 then displays the intensity value.

The mounting portion 7 is provided at a position facing the light receiving portion 6 . The mounting portion 7 may be part of the housing 4 . The mounting portion 7 defines the position of the catheter kit 30 with respect to the light receiving portion 6 . The position of the catheter kit 30 with respect to the light receiving section 6 includes the distance from the tip of the catheter kit 30 to the light receiving section 6 in the traveling direction of the laser light L emitted from the catheter kit 30 . Furthermore, this position includes the position of the distal end portion of the catheter kit 30 with respect to the light receiving portion 6 within the plane perpendicular to the traveling direction of the laser light L. As shown in FIG. The mounting portion 7 has an upright tubular portion 7 a protruding from the housing 4 . Furthermore, the standing tubular portion 7a has an adapter placement portion 7H, which is a through hole. Catheter kit 30 is placed in adapter placement section 7H via adapter 3 . The tip of the adapter placement portion 7H is a tip opening 7Ha provided in the inner wall of the housing 4. As shown in FIG. The base end of the adapter placement portion 7H is a base end opening 7Hb provided at the end portion of the attachment portion 7 .

As shown in FIG. 2, adapter 3 attaches catheter kit 30 to power meter 2 . The adapter 3 may be made of polyacetal, for example. The adapter 3 has an adapter body 9 and an adapter flange 11 . The adapter body 9 and the adapter flange 11 are integrally formed. The adapter body 9 is placed in the adapter placement portion 7H. The adapter main body 9 has an adapter tip surface 3a. A male thread may be provided on the outer peripheral surface of the adapter main body 9 . The adapter flange 11 is provided on the proximal end side. The adapter flange 11 has an adapter proximal end surface 3b. The outer diameter of the adapter flange 11 is larger than the inner diameter of the adapter placement portion 7H. The adapter flange 11 may abut against the mounting end surface 7 b of the mounting portion 7 .

The adapter 3 has a hoop placement portion 3H that holds the tip of the catheter kit 30. As shown in FIG. The hoop arrangement portion 3H is a hole extending from the adapter proximal end surface 3b toward the adapter distal end surface 3a. The base end side of the hoop arrangement portion 3H is a base end opening 3Hb provided in the adapter base end surface 3b. Note that the base end opening 3Hb may be chamfered (tapered). An adapter tip wall 3d is provided on the tip side of the hoop arrangement portion 3H. When the catheter kit 30 is placed on the hoop placement portion 3H, the tip of the catheter kit 30 abuts against the adapter tip wall 3d. More specifically, the tip surface of a protective cap 43, which will be described later, abuts against the adapter tip wall 3d. Adapter tip wall 3 d thus defines the insertion depth of catheter kit 30 with respect to adapter 3 . A light passing portion 3e, which is a through hole, is provided in the adapter tip wall 3d. The light passing portion 3 e guides the laser beam L emitted from the catheter kit 30 to the light receiving portion 6 . Therefore, the contact portion 3c (second contact portion) is formed by the adapter tip wall 3d and the light passing portion 3e.

Next, the catheter kit 30 will be described in detail. The catheter kit 30 has a catheter 31 and a catheter housing 32 . Catheter 31 contains optical fiber 33 . In addition to the optical fiber 33, the catheter 31 may also have other components 34 required for treatment and examination. The optical fiber 33 has an optical fiber distal end portion 33a and an optical fiber proximal end portion 33b. The optical fiber tip 33a is inserted into the body. Further, the optical fiber tip portion 33a emits laser light L. As shown in FIG. A light source 101 (see FIG. 1) is connected to the optical fiber proximal end 33b. Then, the laser light L is provided to the optical fiber proximal end portion 33b.

The catheter housing 32 houses the catheter 31 . The catheter housing 32 has a hoop 36, a retaining plug 37 (catheter retaining portion), a protective cap 43, and a bellows 46 (see FIG. 1).

The hoop 36 presents a tubular pipe shape. The hoop 36 referred to in this embodiment is used in the medical field. The hoop 36 is a resin tube into which the catheter 31 is inserted. It should be noted that the hoop 36 may or may not be flexible. Hoop 36 may be flexible or inflexible. The hoop 36 has a hoop distal end portion 36a on which the catheter distal end portion 31a is arranged, and a hoop proximal end portion 36b on which the catheter proximal end portion 31b side is arranged. A tip opening 36c is provided in the hoop tip 36a. That is, the hoop tip 36a is not closed. In other words, the hoop tip 36a is open. The hoop proximal end 36b also has a proximal opening 36d. That is, the hoop proximal end 36b is not closed either. In other words, the hoop proximal end 36b is open. The hoop 36 is provided with a gas introduction hole 36e. A gas introduction hole 36 e is provided in the side wall of the hoop 36 . The gas introduction hole 36e penetrates from the outer peripheral surface to the inner peripheral surface.

Here, the relationship between the inner diameter (f) and outer diameter (d) of the hoop 36 and the inner diameter (e) of the light passing portion 3e of the adapter 3 is f<e<d. According to this dimensional relationship, it is possible to prevent the catheter distal end portion 31a from touching an unsterilized portion.

The holding plug 37 is arranged so as to be press-fittable into the proximal end opening 36d on the side of the hoop proximal end portion 36b. The holding plug 37 has a catheter placement portion 38 , a press-fitting portion 39 press-fitted into the hoop 36 , and a flange portion 41 . The catheter placement portion 38 is a through hole that holds the catheter 31 . Retaining plug 37 retains the position of catheter 31 relative to hoop 36 when inserted into hoop 36 . That is, the retaining plug 37 is fixed with respect to the hoop 36 . The retaining plug 37 retains the catheter 31 . Retaining plug 37 inserted into hoop 36 thus retains the position of catheter 31 relative to hoop 36 .

The catheter placement portion 38 is placed on the side of the catheter proximal end portion 31b. The inner diameter of the catheter placement portion 38 is slightly smaller than the outer diameter of the catheter 31 . With this configuration, the inner peripheral surface of the catheter placement portion 38 is pressed against the outer peripheral surface of the catheter 31 . As a result, the position of catheter 31 relative to retention plug 37 is maintained. The press-fitting portion 39 is press-fitted into the hoop 36 through the base end opening 36d of the hoop base end portion 36b. The outer diameter of the press-fit portion 39 is slightly larger than the inner diameter of the hoop 36 . According to this configuration, the outer peripheral surface of the press-fit portion 39 is pressed against the inner peripheral surface of the hoop 36 . As a result, the position of retaining plug 37 relative to hoop 36 is maintained. The flange portion 41 is provided on the proximal end side of the press-fitting portion 39 . The outer diameter of the flange portion 41 is larger than the inner diameter of the hoop 36 .

A protective cap 43 is attached to the hoop 36 . The protective cap 43 has a tubular shape with one end closed and the other end open. The protective cap 43 may be made of acrylic, for example. A protective cap 43 closes the tip opening 36c of the hoop tip 36a. This configuration protects the catheter tip 31a. Also, the protective cap 43 transmits the laser light L emitted from the catheter distal end portion 31a. The protective cap 43 has a cap distal end portion 43a and a cap proximal end portion 43b. The cap tip portion 43a has a transmission window portion 43c. The transmission window portion 43c closes the tip opening 36c. Furthermore, the transmission window part 43c transmits the laser beam L. As shown in FIG. The cap base end portion 43b has a base end opening 43Hb of a hoop arrangement portion 43H into which the hoop 36 can be inserted.

A bellows 46 is positioned between the hoop 36 and the retaining plug 37 . The bellows 46, which is a so-called bellows, is freely expandable and contractable in its axial direction. The bellows 46 have elasticity to maintain a predetermined length when no external force is applied. For example, pressing the bellows 46 axially shortens the length of the bellows 46 . On the other hand, when the pressing is stopped, the length of the bellows 46 returns to the length before pressing.

The bellows 46 has a bellows distal end 46a and a bellows proximal end 46b. The bellows tip 46a abuts the hoop base 36b. The bellows proximal end portion 46 b contacts the flange portion 41 of the retaining plug 37 . According to this configuration, the distance between the proximal end surface of the hoop proximal end portion 36b and the distal end surface of the flange portion 41 of the holding plug 37 is maintained constant (see the distance D1 in part (a) of FIG. 3). On the other hand, it is assumed that the holding plug 37 is pushed toward the hoop 36 and the press-fit portion 39 of the holding plug 37 is press-fitted into the hoop 36 . In this case also, the restoring force of the bellows 46 is generated. However, the restoring force is smaller than the frictional force between the press-fit portion 39 and the inner peripheral surface of the hoop 36 . Therefore, the state in which the holding plug 37 is pushed in is maintained (see the interval D2 in part (b) of FIG. 3). Note that the bellows 46 may be one that does not generate a restoring force. In this case, the bellows 46 can be extended (i.e., FIG. 3(a)) and contracted (FIG. 3(b)) without the need for separate components. , respectively.

That is, the bellows 46 and retaining plug 37 allow the position of the catheter 31 relative to the hoop 36 to be switched between the first position and the second position. Therefore, the bellows 46 and the holding plug 37 constitute a position adjusting mechanism 47 (position adjusting portion). First, when the retaining plug 37 is not pushed into the hoop 36, the catheter 31 is held in the first position. In this first position, the catheter distal end portion 31a is arranged proximally with respect to the hoop distal end portion 36a (see part (a) of FIG. 3). Here, the distance from the distal end surface of the hoop distal end portion 36a to the distal end surface of the catheter distal end portion 31a is defined as D3. The interval D3 is the interval D1 minus the interval D2 (D3=D1-D2). On the other hand, when retaining plug 37 is pushed into hoop 36, catheter 31 is held in the second position. In this second position, the positions of the hoop distal end portion 36a and the catheter distal end portion 31a coincide with each other (see part (b) of FIG. 3).

Next, a light intensity measuring method using the light measuring device 1 will be described with reference to the flowchart shown in FIG. First, the process of preparing the catheter kit 30 will be described.

Step S2 is performed (see part (a) of FIG. 5). First, the protective cap 43 (closing part, cap member) is attached to the hoop 36 . In this step S2, the hoop 36 is completely covered with the protective cap 43. As shown in FIG. In other words, the tip surface of the hoop tip portion 36a is brought into contact with the inner surface of the cap tip portion 43a. In step S2, a gap may be provided between the front end surface of the hoop front end portion 36a and the inner surface of the cap front end portion 43a.

Next, step S4 is performed (see part (b) of FIG. 5). In this step S4, the catheter 31 is accommodated in the hoop 36. As shown in FIG. Further, in step S4, the catheter tip 31a is not aligned with the hoop tip 36a. That is, the bellows 46 are arranged between the hoop 36 and the retaining plug 37 . That is, the catheter 31 is housed in the hoop 36 so that the catheter 31 is in the first position. Specifically, the retaining plug 37 is attached to the bellows base end portion 46b. Further, the bellows distal end portion 46a is attached to the proximal end surface of the hoop proximal end portion 36b. Here, the bellows 46 has a predetermined length in its axial direction. This predetermined length corresponds to, for example, the distance from the distal end surface of the hoop distal end portion 36a to the distal end surface of the catheter distal end portion 31a in the storage state. As for the order of performing the steps S2 and S4, the step S4 may be performed after the step S2 as described above. Moreover, you may perform process S2 after process S4.

Next, step S6 is performed (see part (c) of FIG. 5). In this step S6, the catheter kit 30 is sterilized. Specifically, first, the catheter kit 30 is put into the sterile bag 102 . The sterilization bag 102 is then sealed. Catheter kit 30 and sterile bag 102 are then placed inside a chamber (not shown). The interior of the chamber is then evacuated. Next, sterilization gas G is supplied to the interior of the chamber. One side of the sterilization bag 102 is made of vinyl and the other side is made of non-woven fabric. Therefore, even when the sterilization bag 102 is sealed, the sterilization gas G is filled inside the bag. The sterilization gas G includes ethylene oxide gas (EoG). Then, the sterilization gas G sterilizes the catheter kit 30 .

By the way, the catheter 31 is housed inside the hoop 36 . The hoop tip 36a is closed by a protective cap 43. As shown in FIG. The hoop proximal end 36b is closed by a retaining plug 37 and a bellows 46. As shown in FIG. Here, the hoop 36 has gas introduction holes 36e. The sterilization gas G is introduced into the hoop 36 through the gas introduction hole 36e. Therefore, according to the gas introduction hole 36e, the catheter 31 housed in the hoop 36 can be reliably sterilized. After the sterilization gas G is filled, the sterilization gas G is degassed from the chamber.

Through the steps S2, S4, and S6 described above, the sterilized catheter kit 30 is prepared.

Next, the process of measuring the catheter kit 30 will be described.

First, step S8 is performed (see part (a) of FIG. 6). Specifically, the catheter kit 30 is removed from the sterile bag 102 . Then, the light source 101 is connected to the optical fiber proximal end portion 33 b of the optical fiber 33 .

Next, step S10 is performed (see part (b) of FIG. 6). In this step S10, the holding plug 37 is pushed into the hoop 36. As shown in FIG. That is, the catheter tip 31a is aligned with the hoop tip 36a.

Next, step S12 is performed (see part (a) of FIG. 7). First, the catheter kit 30 is attached to the power meter 2 . More specifically, the adapter 3 is screwed into the mounting portion 7 of the power meter 2 . Then, the distal end side (protection cap 43 side) of the catheter kit 30 is inserted into the adapter 3 .

Next, step S14 is performed (see part (a) of FIG. 7). Specifically, the light source 101 is operated. As a result, laser light L is generated. The laser light L is emitted from the catheter distal end portion 31 a through the optical fiber 33 . The emitted laser light L is incident on the light receiving section 6 . The light receiving section 6 outputs an electrical signal corresponding to the incident laser beam L. As shown in FIG. The content of the signal is displayed on the processing unit 8 . Based on the contents of the displayed signal, it is confirmed that the predetermined intensity of the laser light L is obtained.

Next, step S16 is performed (see part (b) of FIG. 7). Specifically, the catheter kit 30 is pulled out from the adapter 3 . Next, the holding plug 37 is pulled out from the hoop 36 . As a result, catheter 31 is removed from hoop 36 . Then, in step S18 (not shown), the catheter 31 is used to perform a predetermined treatment or examination.

In the optical measurement device 1 according to the embodiment, the attachment portion 7 defines the position of the hoop 36 with respect to the light receiving portion 6 . As a result, it is not necessary to remove the catheter 31 from the hoop 36 in order to measure the intensity of the laser light L. FIG. Then, the intensity of the laser light L can be measured while the catheter 31 is housed in the hoop 36 . As a result, cleanliness of the catheter 31 can be maintained. Furthermore, there is no need to remove catheter 31 from hoop 36 . As a result, the steps required for measuring the laser light L can be simplified. Therefore, according to the light measuring device 1, it is possible to maintain the cleanliness of the catheter 31 and to easily perform the work of checking the light intensity.

In the catheter kit 30 according to the embodiment, the position of the catheter 31 with respect to the hoop 36 is held by the holding plug 37 . According to this configuration, when the intensity of the laser light L is measured, it is possible to suppress the occurrence of variations in the distance from the catheter distal end portion 31a to the light receiving portion 6. FIG.

Furthermore, the catheter kit 30 further includes a position adjustment mechanism 47 provided at the hoop proximal end 36b to change the position of the catheter distal end 31a with respect to the hoop distal end 36a in the extending direction of the hoop 36. FIG. With this configuration, it is possible to switch between the position of the catheter distal end portion 31a during storage and the position of the catheter distal end portion 31a during measurement. That is, during storage, the catheter distal end portion 31a can be arranged on the far side with respect to the hoop distal end portion 36a. As a result, the catheter distal end portion 31a can be protected. Furthermore, it becomes possible to align the catheter distal end portion 31a with the hoop distal end portion 36a during measurement. As a result, variations in the distance from the catheter distal end portion 31a to the light receiving portion 6 can be suppressed.

The retaining plug 37 of the catheter kit 30 retains the position of the catheter 31 with respect to the position of the hoop 36 in the extending direction of the hoop 36 so that the catheter distal end portion 31a is aligned with the hoop distal end portion 36a. This configuration defines the position of the hoop tip 36a. As a result, the position of the catheter tip 31a is defined. Therefore, the occurrence of variations in the distance from the catheter distal end portion 31a to the light receiving portion 6 can be further suppressed.

Catheter kit 30 further includes a protective cap 43 attached to hoop tip 36a to close distal opening 36c of hoop tip 36a. According to this configuration, the catheter distal end portion 31a can be protected.

More specifically, the catheter kit 30 further comprises a protective cap 43 attached to the hoop 36 and an adapter 3 for placing the hoop 36 with the protective cap 43 attached to the mounting portion 7 . Hoop 36 has hoop tip 36a in which catheter tip 31a is disposed and which includes tip opening 36c. A protective cap 43 is attached to the hoop tip 36a. The protective cap 43 has a cap tip portion 43a that closes the tip opening 36c and includes a transmission window portion 43c that allows the laser light L emitted from the optical fiber 33 to pass therethrough. The adapter 3 has a contact portion 3c against which the cap tip portion 43a abuts. According to this configuration, a protective cap 43 having a transmission window portion 43c is arranged between the catheter distal end portion 31a and the light receiving portion 6. As shown in FIG. The transmission window portion 43c closes the tip opening 36c of the hoop tip portion 36a. Therefore, the catheter distal end portion 31a can be protected.

In the optical measurement method according to the embodiment, the position of the FOUP 36 with respect to the light receiving section 6 is defined in the step S<b>12 of placing the FOUP 36 on the mounting section 7 . As a result, it is not necessary to remove the catheter 31 from the hoop 36 in order to measure the intensity of the laser light L. FIG. Then, in the step S14 of obtaining the intensity of the laser light L, it becomes possible to measure the intensity of the laser light L with the catheter 31 accommodated in the hoop 36 . Therefore, cleanliness of the catheter 31 can be maintained. Furthermore, there is no need to remove catheter 31 from hoop 36 . As a result, the steps required for measuring the laser light L can be simplified. Therefore, according to the optical measurement method, it is possible to maintain the cleanliness of the catheter 31 and to easily perform the operation of confirming the light intensity.

The present invention has been described in detail based on its embodiments. However, the present invention is not limited to the above embodiments. Various modifications are possible for the present invention without departing from the gist thereof. For example, the catheter kit is not limited to the configurations shown in the above embodiments. Catheter kits can take a variety of configurations.

The catheter kit 30 according to the embodiment had a configuration (protective cap 43) that closes the tip opening 36c of the hoop tip 36a. The configuration for closing the tip opening 36c may be the configuration shown in modified examples 1, 2, and 3 below.

<Modification 1>
As shown in part (a) of FIG. 8 , a catheter kit 30C according to Modification 1 has a protective cap 48 . The protective cap 48 may be removable from the hoop 36 . Alternatively, the protective cap 48 may be fixed to the hoop 36 with an adhesive or the like so that it cannot be removed from the hoop 36 . The protective cap 48 is made of a material transparent to the laser light L. As shown in FIG. The protective cap 48 has a cap body portion 48a and a flange portion 48b. The cap body portion 48a has a cylindrical shape. The cap body portion 48a is fitted into the hoop tip portion 36a. The flange portion 48b is provided on the distal end side of the cap body portion 48a. The flange portion 48b has a disc shape. The flange portion 48b has substantially the same diameter as the outer peripheral surface of the hoop 36. As shown in FIG. That is, the diameter of the flange portion 48b is larger than the inner diameter of the tip opening 36c. According to this configuration, the base end face of the flange portion 48b contacts the tip end face of the hoop tip portion 36a. As a result, the insertion depth of the protective cap 48 can be defined.

The protective cap 48 has a catheter placement portion 48c that defines the position of the catheter tip 31a. The catheter placement portion 48 c aligns the center axis A31 of the catheter 31 with the center axis A36 of the hoop 36 . In other words, catheter placement portion 48c defines the position of catheter tip 31a in the diametrical direction of hoop . Further, the catheter placement portion 48c also defines the direction of the catheter 31 (that is, the emission direction of the laser light L) in a predetermined direction. With such a catheter placement portion 48c, the position and orientation of the catheter distal end portion 31a with respect to the light receiving portion 6 can be defined with high accuracy. Therefore, an accurate light intensity value can be obtained. In addition, it is possible to suppress the occurrence of variations in light intensity for each measurement.

The catheter placement portion 48c is a tapered hole extending from the proximal end surface of the cap body portion 48a toward the flange portion 48b. The diameter of the catheter placement portion 48c gradually decreases toward the flange portion 48b. The catheter placement portion 48c has a proximal end opening 48d provided on the proximal end surface and a bottom portion 48e provided on the flange portion 48b side. The inner diameter of the proximal opening 48 d is larger than the outer diameter of the catheter 31 . Furthermore, the inner diameter of the proximal opening 48d is slightly smaller than the inner diameter of the hoop 36. As shown in FIG. The diameter of the bottom portion 48 e is smaller than the outer diameter of the catheter 31 . Therefore, the distal end surface of the catheter distal end portion 31a does not contact the bottom portion 48e. According to such a catheter arranging portion 48c, when the catheter 31 is inserted into the hoop 36 from the base end side to the distal end side, the catheter distal end portion 31a can be preferably guided to the catheter arranging portion 48c. When the protective cap 48 is used, the distal end surface of the catheter distal end portion 31a does not protrude from the distal end surface of the hoop distal end portion 36a. Therefore, the position of the catheter distal end portion 31a in the emission direction of the laser light L is defined.

According to the protective cap 48 , the laser beam L is incident on the light receiving section 6 through the cap body portion 48 a and the flange portion 48 b. Specifically, the shape of the catheter placement portion 48c may be configured such that the optical axis of the laser light L intersects the tapered surface of the catheter placement portion 48c (see arrow W1). The shape of the catheter placement portion 48c may be such that the optical axis of the laser light L does not intersect the tapered surface. That is, the shape of the catheter placement portion 48c may be configured such that the optical axis of the laser light L intersects the bottom portion 48e (see arrow W2).

<Modification 2>
As shown in part (b) of FIG. 8, the catheter kit 30D according to Modification 2 can also regulate the position of the catheter distal end portion 31a like the catheter kit 30C according to Modification 1. FIG.

Catheter kit 30D has protective cap 49 . The protective cap 49 may be removable from the hoop 36 . The protective cap 49 may be permanently secured to the hoop 36 with an adhesive or the like. The protective cap 49 has a main tubular portion 49a and a tapered tubular portion 49b. The body tubular portion 49a is a tubular member that covers the hoop tip portion 36a. The inner diameter of the main body tube portion 49a is substantially the same as or slightly smaller than the outer diameter of the hoop 36 . The tapered tubular portion 49b is provided on the distal end side of the main tubular portion 49a. The tapered cylindrical portion 49b has a truncated cone shape. The outer diameter of the tapered tubular portion 49b gradually decreases toward the distal end side from the portion continuous with the main tubular portion 49a. The tapered tubular portion 49b has a tapered hole. The inner diameter of the tapered hole tapers toward the tip. This tapered hole is the catheter placement portion 49c.

The catheter placement portion 49c is a tapered hole. The tapered hole extends toward the tip from the boundary between the main tubular portion 49a and the tapered tubular portion 49b. The diameter of the catheter placement portion 49c gradually decreases toward the tip. The catheter placement portion 49c has a proximal opening 49d and a distal bottom portion 49e. The inner diameter of the base end opening 49 d is substantially the same as the outer diameter of the hoop 36 . The diameter of the tip base 49 e is smaller than the outer diameter of the catheter 31 . Therefore, the distal end surface of the catheter distal end portion 31a does not contact the distal end bottom portion 49e. According to such a catheter placement portion 49c, when the catheter 31 is inserted into the hoop 36 from the proximal side to the distal side, the catheter distal end portion 31a can be preferably guided to the catheter placement portion 49c. When the protective cap 49 is used, the distal end surface of the catheter distal end portion 31a protrudes from the distal end surface of the hoop distal end portion 36a. According to this configuration, the catheter distal end portion 31a can be brought closer to the light receiving portion 6 while the catheter distal end portion 31a is protected.

According to the protective cap 49 , the laser light L is incident on the light receiving section 6 through the tapered cylindrical portion 49 b. Specifically, the shape of the catheter placement portion 49c is such that the optical axis of the laser light L does not intersect the tapered surface but intersects the tip bottom portion 49e (see arrow W3). As for the shape of the catheter placement portion 49c, the optical axis of the laser light L may intersect the tapered surface.

<Modification 3>
As shown in part (c) of FIG. 8 , a catheter kit 30E according to Modification 3 has a protective lid portion 51 . The protective lid portion 51 has a disc shape. The protective lid portion 51 has an outer peripheral surface 51a, a distal end surface 51b, and a proximal end surface 51c. The outer diameter of the protective lid portion 51 is approximately equal to the inner diameter of the hoop 36 . The protective lid portion 51 is fitted into the tip opening 36c of the hoop tip portion 36a. As for the protection cover part 51, the front-end|tip surface 51b is exposed outside. A base end surface 51 c of the protective lid portion 51 faces the inner side of the hoop 36 . That is, the catheter distal end portion 31a faces the proximal end surface 51c. The laser beam L emitted from the catheter distal end portion 31 a enters the light receiving portion 6 after passing through the protective lid portion 51 . Therefore, the protective lid portion 51 is made of a material transparent to the laser beam L. As shown in FIG.

The protective lid portion 51 is fixed to the hoop 36 with an adhesive or the like so that it cannot be removed. That is, the protective lid portion 51 is integrated with the hoop 36 . Specifically, the outer peripheral surface 51a of the protective lid portion 51 is fixed to the inner peripheral surface of the hoop 36 by adhesion or the like. With this configuration, the protective lid portion 51 does not drop off from the hoop 36 . Therefore, the catheter distal end portion 31a can be reliably protected.

In the catheter kit 30 according to the embodiment, the tip opening 36c of the hoop tip portion 36a is open. Thus, a catheter kit having an open tip opening 36c may have the configuration shown in variations 4, 5, and 6 below.

<Modification 4>
As shown in part (a) of FIG. 9 , a catheter kit 30F according to Modification 4 has a hoop 52 . The hoop 52 has a catheter placement portion 52b provided at the hoop distal end 52a. The catheter placement portion 52b aligns the central axis A31 of the catheter 31 with the central axis A52 of the hoop 52. As shown in FIG. The catheter placement portion 52b has a through hole 52c and a tapered portion 52d. The through holes 52c are arranged side by side along the center axis A52 of the hoop 52. As shown in FIG. The tapered portion 52d constitutes a catheter placement portion 52b. The through hole 52c includes a distal opening 52e formed on the distal surface of the hoop distal portion 52a and a proximal opening 52f formed on the proximal side. The tapered portion 52 d includes a distal end portion 52 g continuous with the proximal end opening 52 f and a proximal end portion 52 h continuous with the inner peripheral surface of the hoop 52 . The inner diameter of the through hole 52 c is smaller than the inner diameter of the hoop 52 . Therefore, the inner diameter of the tapered portion 52d gradually decreases from the proximal end portion 52h toward the distal end portion 52g. Furthermore, the inner diameter of through-hole 52c is smaller than the outer diameter of catheter 31 . Therefore, the catheter tip 31a is not inserted into the through hole 52c.

The catheter placement portion 52b is part of the hoop 52. As shown in FIG. In other words, the catheter placement portion 52b is a portion of the hoop distal end portion 52a where the thickness of the hoop 52 gradually increases toward the distal end. In such a catheter placement portion 52b, the catheter tip portion 31a does not protrude from the hoop tip portion 52a. Therefore, the catheter tip 31 a does not protrude from the adapter tip surface 53 a of the adapter 53 . Therefore, the position of the catheter distal end portion 31a in the emission direction of the laser light L is defined.

The laser light L emitted from the catheter 31 is incident on the light receiving section 6 via the through hole 52c (see arrow W4). Therefore, the laser light L emitted from the catheter 31 directly enters the light receiving section 6 . As a result, highly accurate measurement results can be obtained. Also, the laser beam L passes through the through hole 52c. Therefore, it does not matter whether or not the material forming the hoop 52 is transparent to the laser light L. FIG. The hoop 52 may be made of a translucent material. Alternatively, the hoop 52 may be made of a non-translucent material.

<Modification 5>
As shown in part (b) of FIG. 9 , a catheter kit 30G according to modification 5 has a hoop 54 . The hoop 54 has a hoop body portion 54a and a projecting tubular portion 54b. The hoop body portion 54a has a hoop distal end portion 54d including a distal end surface 54c. The central axis of the protruding tubular portion 54b overlaps with the central axis of the hoop body portion 54a. The protruding tubular portion 54b protrudes from the tip surface 54c. The outer diameter of the projecting tubular portion 54b is smaller than the outer diameter of the hoop body portion 54a. Therefore, the front end surface 54c of the hoop body portion 54a and the outer peripheral surface 54e of the projecting tubular portion 54b form a stepped portion.

When the hoop 54 is inserted into the adapter 56, the protruding tubular portion 54b protrudes from the tip opening 56b of the adapter tip portion 56a. A tip surface 54c of the hoop main body portion 54a abuts the inner surface of the adapter tip portion 56a. A tip surface 54 c of the hoop main body 54 a defines the insertion depth of the hoop 54 into the adapter 56 .

The hoop 54 has a catheter placement portion 54f. The catheter placement portion 54f is part of the hoop 54. As shown in FIG. The catheter placement portion 54f is a tapered hole. The inner diameter of the catheter placement portion 54f gradually decreases from the proximal side to the distal side. Specifically, the proximal end portion 54g of the catheter placement portion 54f is provided on the hoop body portion 54a. The inner diameter of the base end portion 54g is equal to the inner diameter of the hoop body portion 54a. A distal end portion 54h of the catheter placement portion 54f is an opening provided in a distal end surface 54c of the projecting tubular portion 54b. The inner diameter of the tip portion 54 h is smaller than the inner diameter of the hoop 54 . Furthermore, the inner diameter of the tip portion 54 h is smaller than the outer diameter of the catheter 31 . The inner diameter of the catheter placement portion 54f is larger than the outer diameter of the catheter 31 at the position corresponding to the distal end face 54c of the hoop body portion 54a.

According to this configuration, when the catheter 31 is inserted into the catheter placement portion 54f, the catheter distal end portion 31a moves toward the distal end side of the position corresponding to the distal end surface 54c of the hoop body portion 54a, which is larger than the outer diameter of the catheter 31. placed. Therefore, the catheter distal end portion 31a can be brought closer to the light receiving portion 6. FIG. As a result, highly accurate light intensity can be obtained. Further, the opening provided in the projecting tubular portion 54b is smaller than the outer diameter of the catheter 31. As shown in FIG. As a result, the catheter distal end portion 31a does not protrude distally from the projecting tubular portion 54b. Therefore, the projecting tubular portion 54b protects the catheter distal end portion 31a.

<Modification 6>
As shown in part (c) of FIG. 9 , a catheter kit 30H according to Modification 6 has a hoop 57 . The hoop 57 has a hoop body portion 57a and a hoop flange portion 57b. The hoop body portion 57a has a hoop tip surface 57c. The central axis of the hoop flange portion 57b overlaps the central axis of the hoop body portion 57a. The hoop flange portion 57b is provided at a position separated from the hoop distal end surface 57c of the hoop main body portion 57a by a predetermined distance toward the base end side. The predetermined distance is, for example, greater than the distance from the adapter distal end surface 58a of the adapter 58 to the adapter proximal end surface 58b. The outer diameter of the hoop flange portion 57b is larger than the inner diameter of the hoop placement portion 58d of the adapter 58 . Therefore, when the hoop 57 is inserted into the adapter 58, the tip surface 57h of the hoop flange portion 57b contacts the adapter 58. As shown in FIG. More specifically, the distal end surface 57h of the hoop flange portion 57b contacts the adapter proximal end surface 58b. The hoop flange portion 57 b defines the insertion depth of the hoop 57 into the adapter 58 . The distance from the position where the hoop flange portion 57b is provided to the hoop distal end surface 57c is greater than the distance from the adapter distal end surface 58a to the adapter proximal end surface 58b. Therefore, when the hoop flange portion 57b contacts the adapter 58, the hoop tip surface 57c protrudes from the adapter tip surface 58a.

The hoop 57 has a catheter placement portion 57e. The catheter placement portion 57e is part of the hoop 57. As shown in FIG. The catheter placement portion 57e is a tapered hole. The inner diameter of the catheter placement portion 57e gradually decreases from the proximal side to the distal side. Specifically, the inner diameter of the proximal end portion 57f of the catheter placement portion 57e is equal to the inner diameter of the hoop body portion 57a. A distal end portion 57g of the catheter placement portion 57e is an opening provided in the hoop distal end surface 57c. The inner diameter of the tip portion 57g is smaller than the inner diameter of the hoop 57 . Furthermore, the inner diameter of the tip portion 57 g is smaller than the outer diameter of the catheter 31 . The inner diameter of the catheter placement portion 57e is larger than the outer diameter of the catheter 31 at the position where the hoop body portion 57a protrudes from the adapter distal end surface 58a.

According to this configuration, when the catheter 31 is inserted into the catheter placement portion 57e, the catheter tip portion 31a is placed on the tip side of the adapter tip surface 58a. Therefore, the catheter distal end portion 31a comes closer to the light receiving portion 6. As shown in FIG. As a result, highly accurate light intensity can be obtained. Also, the opening provided in the distal end portion 57g is smaller than the outer diameter of the catheter 31 . As a result, the catheter distal end portion 31a does not protrude distally from the hoop distal end surface 57c. Therefore, the tip 57g protects the catheter tip 31a.

The catheter kit 30 according to the embodiment has a position adjustment mechanism 47 that switches the position of the catheter 31 with respect to the hoop 36. FIG. A specific configuration of the position adjustment mechanism may be a configuration shown in modified examples 7 and 8 below.

<Modification 7>
As shown in FIG. 10, a catheter kit 30J according to Modification 7 has a position adjustment mechanism 59 having a configuration different from that of the embodiment. The position adjusting mechanism 59 is a tube 59a made of silicone rubber or the like. Tube 59 a is positioned between hoop 36 and retaining plug 61 . The tube 59a maintains and changes the spacing between the hoop proximal end 36b and the retaining plug distal surface 61a.

The hoop proximal end portion 36b is inserted into the tube distal end portion 59b. The press-fit portion 61b of the holding plug 61 is inserted into the tube proximal end portion 59c. In other words, the position adjustment mechanism 59 has a double structure composed of the tube 59 a and the hoop 36 . Here, the tube proximal end portion 59c is fixed to the holding plug 61. As shown in FIG. On the other hand, the tube distal end portion 59b is slidable relative to the hoop proximal end portion 36b. Such a configuration can be realized by setting the inner diameter of the tube distal end portion 59b and the outer diameter of the hoop proximal end portion 36b to predetermined dimensional values.

As shown in part (a) of FIG. 10, when the catheter kit 30J is stored, the tube 59a maintains a predetermined distance between the hoop proximal end 36b and the retaining plug distal end surface 61a. At this time, the catheter distal end portion 31a is arranged at the proximal end side by a distance from the hoop distal end portion 36a (first position). That is, the catheter tip 31a is protected by the hoop 36. As shown in FIG.

As shown in part (b) of FIG. 10, when measuring the laser beam L using the catheter kit 30J, the holding plug 61 is pushed toward the distal end. Then, slippage occurs between the tube distal end portion 59b and the hoop proximal end portion 36b. As a result, the tube 59a and the holding plug 61 move together toward the distal end. That is, the distance between the hoop proximal end portion 36b and the retaining plug distal end surface 61a is reduced. Finally, the holding plug distal end surface 61a comes into contact with the hoop proximal end portion 36b. At this time, the catheter distal end portion 31a coincides with the position of the hoop distal end portion 36a. That is, the catheter distal end portion 31a is arranged at a position (second position) suitable for light intensity measurement.

<Modification 8>
As shown in FIG. 11, a catheter kit 30K according to Modification 8 may have a position adjustment mechanism 62 having a different configuration. The position adjusting mechanism 62 is composed of a guide pin 62a and a guide groove 62b. These guide pins 62a and guide grooves 62b reliably switch between the state of protecting the catheter distal end portion 31a and the state of measuring the laser light L using the catheter kit 30K. Furthermore, the position adjustment mechanism 62 can reliably maintain each state. Catheter kit 30K has tube 63 . Tube 63 is positioned between hoop 64 and retaining plug 65 . That is, the position adjustment mechanism 62 according to Modification 8 has a so-called double structure, like the position adjustment mechanism 62 according to Modification 7.

For example, the guide groove 62b is provided on the outer peripheral surface of the hoop base end portion 64a. The guide groove 62b may pass through the side wall of the hoop 64. As shown in FIG. Also, the guide groove 62b may have a shape having a bottom. The guide groove 62b has a first restricting portion 62c and a second restricting portion 62d extending in the circumferential direction, and a connecting groove portion 62e extending in the axial direction. One end of the first restricting portion 62c and one end of the second restricting portion 62d are connected by a connecting groove portion 62e. The connecting groove portion 62 e extends in the axial direction of the hoop 64 . The first restricting portion 62c is provided on the hoop base end surface side. The second restricting portion 62d is provided closer to the tip side than the first restricting portion 62c. The distance from the first restricting portion 62 c to the second restricting portion 62 d corresponds to the travel distance of the catheter 31 . The guide pin 62 a is provided on the inner peripheral surface of the tube 63 . The guide pin 62a is a cylindrical protrusion. The guide pin 62a extends along the radial direction of the tube 63 from the inner peripheral surface. The diameter of the guide pin 62a is substantially the same as or slightly smaller than the guide groove 62b.

As shown in part (a) of FIG. 11, when the catheter kit 30K is stored or the like, the guide pin 62a is fitted into the first restricting portion 62c. When the guide pin 62a is fitted in the first restricting portion 62c, the catheter distal end portion 31a is in a protected state disposed on the far side of the hoop 64 (first position). The first restricting portion 62c extends in the circumferential direction. As a result, the guide pin 62a does not move axially. Therefore, since the catheter distal end portion 31a is arranged deep inside the hoop 64, it can be reliably maintained in a protected state.

Next, the switching operation will be explained. As shown in part (b) of FIG. 11, first, the tube 63 is rotated in the direction in which the first restricting portion 62c extends. Then, the guide pin 62a moves to the proximal end of the connecting groove 62e. Then, the guide pin 62a is moved along the connecting groove portion 62e. That is, the tube 63 and the holding plug 65 are moved to the distal end side. This movement aligns the catheter tip 31a with the hoop tip 36a. After the guide pin 62a is moved to the tip of the connecting groove 62e, the tube 63 is rotated in the circumferential direction. Then, the guide pin 62a fits into the second restricting portion 62d. When the guide pin 62a is fitted into the second restricting portion 62d, the catheter distal end portion 31a is in a measurement state (second position) coinciding with the hoop distal end portion 36a. The second restricting portion 62d extends in the circumferential direction similarly to the first restricting portion 62c. As a result, the guide pin 62a does not move axially. Therefore, the state in which the catheter distal end portion 31a is arranged at the hoop distal end portion 36a can be reliably maintained.

The catheter kit 30 according to the embodiment had a mechanism for holding the position of the catheter 31 with respect to the hoop 36 . A specific configuration of this mechanism may be a configuration shown in modified examples 9, 10, and 11 below.

<Modification 9>
As shown in part (a) of FIG. 12 , a catheter kit 30L according to Modification 9 may have a clip 66 as a mechanism for holding the position of the catheter 31 . A clip 66 is attached to the hoop proximal end 36b. Clip 66 creates a force that radially collapses hoop 36 . When the hoop 36 is radially crushed, the inner peripheral surface of the hoop 36 is pressed against the outer peripheral surface of the catheter 31 . The clip 66 is attached so as to sandwich the hoop 36 from the radial direction. Accordingly, the sidewalls of hoop 36 collapsed by clip 66 sandwich catheter 31 . This configuration maintains the position of catheter 31 relative to hoop 36 . Also, when moving the hoop 36, the clip 66 is removed. According to the holding mechanism by the clip 66, it is possible to easily switch between a state in which the catheter 31 is held and a state in which the catheter can be moved.

<Modification 10>
As shown in part (b) of FIG. 12, a catheter kit 30P according to Modification 10 may have a tube 67 as a holding mechanism. This configuration is similar to that of Modification 7. That is, it has a double structure. A different point from the configuration of Modified Example 7 is that the tube distal end portion 67a is configured so as to be difficult to slide relative to the hoop proximal end portion 36b. In Modification 10, the inner diameter of the tube 67 is smaller than the outer diameter of the hoop 36 . As a result, when the hoop 36 is inserted into the tube 67, it is press-fitted.

<Modification 11>
As shown in part (c) of FIG. 12, a catheter kit 30Q according to modification 11 may have a clamp 68 as a holding mechanism. The clamp 68 is a U-shaped component to which the proximal end portion 31b of the catheter can be attached and detached. Clamp 68 includes a fixing portion 69 fixed to the outer peripheral surface of hoop 36 . The proximal end portion 31b of the catheter is inserted through the opening of the clamp 68 along the radial direction. As a result, the catheter proximal end 31b is fixed to the clamp 68. As shown in FIG. The clamp 68 is then fixed to the hoop 36 by the fixing portion 69 . Catheter 31 is thus held against hoop 36 .

The catheter kit 30 according to the embodiment had a protective cap 43 attached to the hoop tip 36a during storage. The configuration for protecting the catheter distal end portion 31a arranged so as to coincide with the hoop distal end portion 36a may be the configuration shown in modified examples 12 and 13 below.

<Modification 12>
As shown in parts (a) and (b) of FIG. 13 , a catheter kit 30S according to modification 12 has a protective cap 72 . This protective cap 72 has a configuration similar to that of the protective cap 72 of the second modification. A different point from the protective cap 49 of Modified Example 2 is that the protective cap 72 according to Modified Example 12 can be moved with respect to the hoop 36 .

As shown in part (a) of FIG. 13, when the catheter kit 30S is stored, the hoop distal end portion 36a is lightly covered with the protective cap 72. As shown in FIG. According to this configuration, a space is provided between the cap distal end portion 72a of the protective cap 72 and the catheter distal end portion 31a. Therefore, the catheter distal end portion 31a can be suitably protected.

On the other hand, as shown in part (b) of FIG. 13, when measuring the laser light L using the catheter kit 30S, the protective cap 72 is pushed into the hoop 36 side. This pushing reduces the distance between the cap tip 72a and the catheter tip 31a. Then, when the protective cap 72 and the hoop 36 are viewed as one hoop member, the protective cap 72 changes the relative position between the catheter distal end portion 31a and the hoop member. Therefore, the protection cap 72 may be defined as a position adjustment mechanism in a broad sense. Furthermore, the catheter distal end portion 31 a is guided along the tapered inner circumferential surface of the protective cap 72 . As a result of this guidance, the central axis A31 of catheter 31 is aligned with the central axis A36 of hoop 36 . Therefore, variations in the position and orientation of the catheter distal end portion 31a from which the laser light L is emitted are suppressed. As a result, it is possible to measure the light intensity with high accuracy.

<Modification 13>
As shown in part (c) of FIG. 13 , a catheter kit 30R according to Modification 13 has a protective tube 71 . A protective tube 71 is attached to the hoop tip 36a. As a result, hoop 36 is substantially lengthened. The protective tube 71 has a tube proximal end 71a for receiving the hoop distal end 36a and a tube distal end 71b. When tube proximal end 71a is attached to hoop distal end 36a, the substantial distal end of hoop 36 is tube distal end 71b. The tube tip portion 71b protrudes further to the tip side than the hoop tip portion 36a. Therefore, the catheter distal end portion 31a is arranged closer to the proximal side than the tube distal end portion 71b. According to this configuration, the protection tube 71 protects the catheter distal end portion 31a. Then, when measuring the laser beam L, the protective tube 71 is removed.

In addition, the catheter kit includes modifications 1 to 6, 12, and 13 regarding the tip shape, modifications 7 and 8 regarding the position adjustment mechanism, and modifications 9, 10 and 11 regarding the holding mechanism. can be freely combined according to

DESCRIPTION OF SYMBOLS 1... Optical measuring apparatus 2... Power meter 3... Adapter 3b... Base end face of adapter 3H... Hoop arrangement part 3Hb... Base end opening 4... Housing 6... Light receiving part 7... Mounting part 7a... Rising tube portion 7b Mounting end face 7H Adapter placement portion 7Ha Tip opening 7Hb Base end opening 8 Processing device 9 Adapter main body 11 Adapter flange 30, 30C, 30D, 30E, 30F , 30G, 30H, 30J, 30K, 30L, 30P, 30Q, 30R, 30S... Catheter kit, 31... Catheter, 31a... Catheter distal end, 31b... Catheter proximal end, 32... Catheter housing, 33... Optical fiber, 33a... Optical fiber distal end 33b... Optical fiber proximal end 34... Structure 36... Hoop 36a... Hoop distal part 36b... Hoop proximal part 36c... Tip opening 36d... Base opening 36e... Gas introduction hole 37 Holding plug 38 Catheter arrangement portion 39 Press-in portion 41 Flange 43 Protective cap 43a Cap distal end 43b Cap proximal end 43c Transmission window 43H ... hoop arrangement portion 43Hb ... base end opening 46 ... bellows 46a ... bellows tip portion 46b ... bellows base end portion 47 ... position adjustment mechanism 48 ... protection cap 48a ... cap body portion 48b ... flange portion 48c... Catheter arrangement part 48d... Base end opening 48e... Bottom part 49... Protection cap 49a... Body cylinder part 49b... Tapered cylinder part 49c... Catheter arrangement part 49d... Base end opening 49e... Tip bottom part 51 Protective lid portion 51a Outer peripheral surface 51b Distal end surface 51c Base end surface 52 Hoop 52a Hoop distal end 52b Catheter arrangement portion 52c Through hole 52d Tapered portion 52e Distal end Opening 52f... Base end opening 52g... Tip part 52h... Base end part 53... Adapter 54... Hoop 54a... Hoop main body part 54b... Protruding tube part 54c... Tip surface 54d... Hoop tip part 54e... Outer peripheral surface 54f... Catheter arrangement part 54g... Base end part 54h... Tip part 56... Adapter 56a... Adapter tip part 56b... Tip opening 57... Hoop 57a... Hoop body part 57b... Hoop Flange 57c Hoop distal end surface 57e Catheter placement portion 57f Base end portion 57g Distal end portion 57h Distal end surface 58 Adapter 58a Distal end surface of adapter 58b Base end surface of adapter 58d Hoop Arrangement part 59 Position adjustment mechanism 59a Tube 59b Tube tip 59c Tube base end 61 Holding plug 61a Tip surface of holding plug 61b Press-fitting part 62 Position adjustment mechanism 62a Guide pin 62b Guide groove 62c First restriction portion 62d Second restriction portion 62e Connection groove portion 63 Tube 64 Hoop 64a Base end of hoop 65 Holding plug 66 Clip, 67... Tube, 67a... Tip of tube, 68... Clamp, 69... Fixing part, 71... Protection tube, 71a... Base end of tube, 71b... Tip of tube, 72... Protection cap, 72a... Tip of cap 102...sterilization bag, 101...light source, L...laser light, G...sterilization gas.

Claims (5)

a catheter having an optical fiber;
and a catheter housing that houses the catheter,
The catheter housing device is
a hoop that is tubular;
a position adjusting portion provided on the hoop;
a closure at the end of the hoop;
The hoop has a hoop distal end where a catheter distal end from which light transmitted through the optical fiber is emitted, and a hoop proximal end on the side opposite to the hoop distal end,
The position adjustment unit changes the position of the catheter tip with respect to the hoop tip,
The catheter kit according to claim 1, wherein the closing portion has a transmission window portion through which the light emitted from the catheter is transmitted. an end of the hoop having an opening;
A catheter tip from which light transmitted through the optical fiber is emitted is arranged at the end of the hoop,
2. The catheter kit according to claim 1, wherein the transmission window closes the opening and transmits the light. The catheter kit according to claim 1 or 2, wherein the closing portion is a cap member that can be attached to and detached from the hoop. 3. A catheter kit according to claim 1 or 2 , wherein the closure is part of the hoop and is a lid integrated with the hoop. The catheter kit according to any one of claims 1 to 4, wherein the hoop extends in a direction crossing the longitudinal direction of the hoop and has a through hole extending from the outer peripheral surface to the inner peripheral surface.

Images